usb: phy: samsung: Pass enable/disable callbacks through driver data

To remove unnecessary if statements, this patch introduces phy_enable
and phy_disable callbacks in driver data structure that implement
SoC-specific PHY initialization and deinitialization.

Signed-off-by: Tomasz Figa <[e-mail]>
Signed-off-by: Kyungmin Park <[e-mail]>
Signed-off-by: Felipe Balbi <[e-mail]>

drivers/usb/phy/phy-samsung-usb.h

···
 	u32 hostphy_reg_offset;
 	int (*rate_to_clksel)(struct samsung_usbphy *, unsigned long);
 	void (*set_isolation)(struct samsung_usbphy *, bool);
+	void (*phy_enable)(struct samsung_usbphy *);
+	void (*phy_disable)(struct samsung_usbphy *);
 };
 
 /*

drivers/usb/phy/phy-samsung-usb2.c

···
 	samsung_usbphy_cfg_sel(sphy);
 
 	/* Initialize usb phy registers */
-	if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250)
-		samsung_exynos5_usb2phy_enable(sphy);
-	else
-		samsung_usb2phy_enable(sphy);
+	sphy->drv_data->phy_enable(sphy);
 
 	spin_unlock_irqrestore(&sphy->lock, flags);
 
···
 	}
 
 	/* De-initialize usb phy registers */
-	if (sphy->drv_data->cpu_type == TYPE_EXYNOS5250)
-		samsung_exynos5_usb2phy_disable(sphy);
-	else
-		samsung_usb2phy_disable(sphy);
+	sphy->drv_data->phy_disable(sphy);
 
 	/* Enable phy isolation */
 	if (sphy->plat && sphy->plat->pmu_isolation)
···
 	.devphy_en_mask		= S3C64XX_USBPHY_ENABLE,
 	.rate_to_clksel		= samsung_usbphy_rate_to_clksel_64xx,
 	.set_isolation		= NULL, /* TODO */
+	.phy_enable		= samsung_usb2phy_enable,
+	.phy_disable		= samsung_usb2phy_disable,
 };
 
 static const struct samsung_usbphy_drvdata usb2phy_exynos4 = {
···
 	.hostphy_en_mask	= EXYNOS_USBPHY_ENABLE,
 	.rate_to_clksel		= samsung_usbphy_rate_to_clksel_64xx,
 	.set_isolation		= samsung_usbphy_set_isolation_4210,
+	.phy_enable		= samsung_usb2phy_enable,
+	.phy_disable		= samsung_usb2phy_disable,
 };
 
 static struct samsung_usbphy_drvdata usb2phy_exynos5 = {
···
 	.hostphy_reg_offset	= EXYNOS_USBHOST_PHY_CTRL_OFFSET,
 	.rate_to_clksel		= samsung_usbphy_rate_to_clksel_4x12,
 	.set_isolation		= samsung_usbphy_set_isolation_4210,
+	.phy_enable		= samsung_exynos5_usb2phy_enable,
+	.phy_disable		= samsung_exynos5_usb2phy_disable,
 };
 
 #ifdef CONFIG_OF

drivers/usb/phy/phy-samsung-usb3.c

···
 	return reg;
 }
 
-static int samsung_exynos5_usb3phy_enable(struct samsung_usbphy *sphy)
+static void samsung_exynos5_usb3phy_enable(struct samsung_usbphy *sphy)
 {
 	void __iomem *regs = sphy->regs;
 	u32 phyparam0;
···
 
 	phyclkrst &= ~(PHYCLKRST_PORTRESET);
 	writel(phyclkrst, regs + EXYNOS5_DRD_PHYCLKRST);
-
-	return 0;
 }
 
 static void samsung_exynos5_usb3phy_disable(struct samsung_usbphy *sphy)
···
 		sphy->drv_data->set_isolation(sphy, false);
 
 	/* Initialize usb phy registers */
-	samsung_exynos5_usb3phy_enable(sphy);
+	sphy->drv_data->phy_enable(sphy);
 
 	spin_unlock_irqrestore(&sphy->lock, flags);
 
···
 	samsung_usbphy_set_type(&sphy->phy, USB_PHY_TYPE_DEVICE);
 
 	/* De-initialize usb phy registers */
-	samsung_exynos5_usb3phy_disable(sphy);
+	sphy->drv_data->phy_disable(sphy);
 
 	/* Enable phy isolation */
 	if (sphy->drv_data->set_isolation)
···
 	.devphy_en_mask		= EXYNOS_USBPHY_ENABLE,
 	.rate_to_clksel		= samsung_usbphy_rate_to_clksel_4x12,
 	.set_isolation		= samsung_usbphy_set_isolation_4210,
+	.phy_enable		= samsung_exynos5_usb3phy_enable,
+	.phy_disable		= samsung_exynos5_usb3phy_disable,
 };
 
 #ifdef CONFIG_OF